I ate two fruits from my tree (sold by Toptrop) and both had poly embryonic seeds to my surprise. From Wikipedia “The flesh has a rich, sweet flavor with a mild, pleasant aroma and contains a monoembryonic seed.”

Btw, in a similar twist, my Vietnamese Cac Hoa Loc (sold by Toptrop) fruits have mono-embryonic seeds from 3 samples. The original 36" tree had 4 fruits and they were all fiberous and didn't taste good, while its scions grafted on a 10 feet Kent seedling gave same mono-embryonic seeds fruits but tasted excellent: balanced sweet and tart and the aroma of Maha. The seed is so thin that it almost gives 3 cheeks instead of 2 and a seed. I think a strong mature tree gives better tasting fruits in this case. (These Cac Hoa Loc fruits look more like a Mahachanoc without the red tint than the original one from Vietnam, so I don't know if it is a real deal Cac Hoa Loc or something else.)

Edward should have Mono seeds, I planted several Edward mango seeds from Eunice Messners tree.

How did you conclude the seeds were polyembryonic? Sometimes mono seeds can have multiple Sprouts but from the same origin. Polyembryonic seedlings will originate from different segments of the Poly seeds although they can also have multiple Sprouts from the same origin.

"Sometimes mono seeds can have multiple Sprouts but from the same origin."I think I understand this, as in Kent seedling sometime the base of the primary shoot, close to the seed, sprouts multiple smaller shoots.

My Edward seeds have distinct multiple segments as in pic below (borrowed from the web):

Great if it is Indian Iman Pasand mango!!! The description sounds true but my fruits are shorter and stocky while IP is a bit longer. Could IP as an Indian type mango have a poly-embryonic seed? Last night we ate the 3rd fruit and it was so good. The flesh at shoulder (near the stem) is yellow still firm while the beak and center is orange like carrot color, soft and juicy. Very sweet as honey and stint with powerful tart taste.

Well then I have the opportunity to hunt down a real Edward scion for grafting. I'm so lucky that Toptrop shipped the wrong Iman Pasand (or whatever it is) in stead of other lesser mangoes. Here are pic of last might mango:

A couple of informative articles here on polyembryony. If I understand them correctly:1. Polyembryony isn't "all or none". You can expect up to a 10% incidence of monoembrionic seeds in a polyembrionic variety and vice versa.2. Some embryos from a polyembrionic seed are fertilized (zygotic). The others are produced non-sexually (somatic) and are genetically identical to the mother plant so are effectively clones of the tree that produced the fruit. Unfortunately, without genetic testing, the only way to identify the clones is to wait until they bear fruit.3. The "cloned" seedlings of a polyembryonic seed can become more vigorous plants than a parent plant produced by several generations of vegetative propagation.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001100010

A couple of informative articles here on polyembryony. If I understand them correctly:1. Polyembryony isn't "all or none". You can expect up to a 10% incidence of monoembrionic seeds in a polyembrionic variety and vice versa.2. Some embryos from a polyembrionic seed are fertilized (zygotic). The others are produced non-sexually (somatic) and are genetically identical to the mother plant so are effectively clones of the tree that produced the fruit. Unfortunately, without genetic testing, the only way to identify the clones is to wait until they bear fruit.3. The "cloned" seedlings of a polyembryonic seed can become more vigorous plants than a parent plant produced by several generations of vegetative propagation.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012001100010